Edge 540 + Wahoo Heart Rate.

I have a wahoo heart rate sensor, the chargeable one. Recently i've been having issue with it transmitting my heart rate. It usually starts fine and some time later, like 1hour in it starts dropping reading, not connection. Again, never drops connection, but does not transmit the heart rate.

I tried it with wahoo app, and Strava one day each, while connected to the edge, edge does not get the data but on wahoo or strava it never fails so I am discarding sensor problem.

Thoughts?